Basic information Safety Supplier Related

HYDROXYNAPHTHOL BLUE

Basic information Safety Supplier Related

HYDROXYNAPHTHOL BLUE Basic information

Product Name:
HYDROXYNAPHTHOL BLUE
Synonyms:
  • 7-naphthalenedisulfonicacid,3-hydroxy-4-[(2-hydroxy-4-sulfo-1-naphthalenyl)azo]-trisodiumsalt
  • HYDROXYNAPHTHOL BLUE
  • HYDROXYNAPHTHOL BLUE INDICATOR
  • HYDROXYNAPHTHOL BLUE TRISODIUM SALT
  • CALVER(R) 2 CALCIUM INDICATOR
  • 3-HYDROXY-4-(2-HYDROXY-4-SULFO-1-NAPHTHYLAZO)NAPHTHALENE-2,7-DISULFONIC ACID TRISODIUM SALT
  • 1-(2-HYDROXY-4-SULFO-1-NAPHTHYLAZO)-2-NAPHTHOL-3,6-DISULFONIC ACID TRISODIUM SALT
  • 1-(2-NAPHTHOLAZO-3,6-DISULFONIC ACID)-2-NAPHTHOL-4-SULFONIC ACID DISODIUM SALT
CAS:
63451-35-4
MF:
C20H11N2Na3O11S3
MW:
620.47
EINECS:
264-197-7
Product Categories:
  • Organics
Mol File:
63451-35-4.mol
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HYDROXYNAPHTHOL BLUE Chemical Properties

storage temp. 
Store at +15°C to +30°C.
solubility 
340g/l
form 
Solid
color 
Dark Gray
PH
2-3 (10g/l, H2O, 20℃)
Stability:
Stable. Incompatible with strong oxidizing agents.
CAS DataBase Reference
63451-35-4(CAS DataBase Reference)
EPA Substance Registry System
2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-[(2-hydroxy-4-sulfo-1-naphthalenyl)azo]-, trisodium salt (63451-35-4)
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Safety Information

Hazard Codes 
Xi
Risk Statements 
36/37/38
Safety Statements 
26-36
WGK Germany 
WGK 3 highly water endangering
HS Code 
2927 00 00
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HYDROXYNAPHTHOL BLUE Usage And Synthesis

Chemical Properties

blue crystalline powder

Purification Methods

The crude material is treated with hot EtOH to remove soluble impurities, then dissolve in 20% aqueous MeOH and chromatographed on a cellulose powder column with propanol/EtOH/water (5:5:4) as eluent. The upper of three zones was eluted to give the pure dye which is precipitated as the monosodium salt trihydrate by adding conc HCl to the concentrated eluate [Ito & Ueno Analyst 95 583 1970]. It can be converted to the trisodium salt wih the calculated amount of alkali. Indigocarmine (2[1,3-dihydro-3-oxo-5-sulfo-2H -indol-2-ylidene]-2,3-dihydro-3-oxo-1H -

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